28021525272 has 384 divisors, whose sum is σ = 89159616000. Its totient is φ = 7872823296.

The previous prime is 28021525267. The next prime is 28021525309. The reversal of 28021525272 is 27252512082.

28021525272 is a `hidden beast` number, since 2 + 80 + 2 + 1 + 52 + 527 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 125656953 + ... + 125657175.

It is an arithmetic number, because the mean of its divisors is an integer number (232186500).

Almost surely, 2^28021525272 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28021525272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44579808000).

28021525272 is an abundant number, since it is smaller than the sum of its proper divisors (61138090728).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28021525272 is a wasteful number, since it uses less digits than its factorization.

28021525272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467 (or 460 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 28021525272 in words is "twenty-eight billion, twenty-one million, five hundred twenty-five thousand, two hundred seventy-two".